85 results about "Graphyne" patented technology

The invention belongs to the technical field of new energy batteries, and particularly relates to a fluorine-doped graphdiyne material and a preparation method and application thereof. The preparation method of the fluorine-doped graphdiyne material comprises the following steps: in a solvent system, mixing graphdiyne and a solid fluorine source, and drying to obtain a composite precursor; under the protective atmosphere, the composite precursor is annealed, so that the fluorine source is decomposed to release hydrogen fluoride and fluorine free radicals, the hydrogen fluoride or the fluorine free radicals are combined with carbon sites on graphdiyne through nucleophilic substitution, C-F bonds are formed, and the fluorine-doped graphdiyne material is obtained; the mass ratio of graphdiyne to the solid fluorine source is 30: (1-4). The fluorine-doped graphdiyne has the advantages that the defects are increased, the disorder is reduced, and the lithium storage capacity of the graphdiyne is improved, so that the long-term cycle performance and the high-rate performance are improved.

The invention discloses a hydrogen-fluorine atom doped graphdiyne material and a preparation method thereof, and relates to the technical field of carbon materials. According to the method, halogenated aromatic hydrocarbon and an alkynyl compound are taken as raw materials, a palladium catalyst and a copper catalyst are taken as a catalytic system, and an acetylenic bond of the alkynyl compound and the halogenated aromatic hydrocarbon are subjected to a Sonogashira coupling reaction to obtain the hydrogen-fluorine-doped graphite alkynyl material. The graphdiyne material provided by the invention has a large pore diameter, multiple active sites and high thermal stability and chemical stability, so that the hydrofluorine-doped graphdiyne material has excellent electrochemical energy storage property, shows reversible capacity of 1155mAh g <-1 > under 0.05 Ag <-1 > when being used as a negative electrode of a lithium ion battery, and can be used as a negative electrode of the lithium ion battery. And the density is almost 3 times that of a commercial graphite negative electrode material (300-350mAh g <-1 >). The application of the graphdiyne material in the field of electrochemical energy storage is obviously promoted.

The invention relates to a host material for an electrode of a lithium-sulfur battery and a preparation method of the host material. According to the invention, a template is constructed by using a spray pyrolysis process, and the host material for the electrode of the lithium-sulfur battery is finally obtained, and is element-doped graphdiyne with a hollow multi-shell structure. The graphdiyne with a hollow multi-shell structure is doped by doping agents such as a boron source, a nitrogen source, a phosphorus source and a sulfur source, and due to introduction of doping elements, the graphdiyne material has high catalytic activity, can be used for catalyzing oxidation reduction of sulfur species, is beneficial to adsorption of polysulfide and limits the shuttle effect. Through the synergistic effect of the two, the performance of the lithium-sulfur battery can be further improved, and the comprehensive improvement of the energy density, the cycling stability and the rate capability of the lithium-sulfur battery is realized.

The invention relates to the technical field of materials, in particular to a graphdiynyl lanthanide series metal doped copper nano material and a preparation method and application thereof, and the preparation method comprises the following steps: preparing graphdiyne; in an inert gas atmosphere, graphdiyne, CuCl2. 5H2O, Dy (NO3) 3.5 H2O and ascorbic acid are subjected to a reaction in an aqueous solution, and the graphdiynyl lanthanide metal Dy doped copper nano material is obtained. Wherein the copper nano material is a cuprous oxide nano material. According to the prepared Dy-Cu2O / GDY, CO2 can be efficiently converted into C2H5OH through electrocatalytic reduction.

The invention belongs to the technical field of nano materials, and particularly relates to a nitrogen doping method and application of gamma-graphdiyne. Graphdiyne oxide is prepared through a hydrothermal method, then melamine serves as a nitrogen source, graphdiyne oxide serves as a framework, in-situ doping of nitrogen elements and reduction of graphdiyne oxide are achieved at the same time through high-temperature calcination, and the gamma-graphdiyne is obtained. The method is simple and easy to implement, the processing period is short, the doping amount is easy to control, dangerous chemicals such as concentrated sulfuric acid and concentrated nitric acid are not involved, the production safety is greatly improved, and the prepared nitrogen-doped gamma-graphdiyne has the advantages of high purity, high specific surface area, nanoscale pore diameter and excellent wave absorbing performance, gas sensitivity and ferromagnetism.

The application discloses a kind of graphdiyne multilayer composite membrane and preparation method thereof, belong to membrane separation and technical field.Porous base membrane with acetylenic group layer is obtained by two-step modification method, then it is immersed in solution containing graphdiyne monomer and catalyst, and reaction is carried out at a certain temperature, so that graphdiyne material is fully grown on the surface of porous base membrane.Then casting solution of organic polymer, crosslinking agent, catalyst and organic solvent is added to the surface of porous base membrane loaded with graphdiyne, and after the organic solvent is volatilized, it is cured into film at 80 DEG C.The preferential alcohol permeation membrane of the application has a three-layer film structure: organic polymer layer, ultrathin graphdiyne transition layer and porous support layer, effectively avoiding the agglomeration and pore penetration problem of nanomaterial, further strengthening the adsorption process of ethanol.The prepared membrane has high pervaporation alcohol permeation performance, can efficiently and stably recover alcohol, and provides a reference for the development of novel preferential alcohol pervaporation membrane structure.

The invention discloses a lining water seepage prevention structure and a construction technology thereof. The structure comprises a substrate layer made of sugarcane fibers and Portland cement, and the substrate layer effectively resists cracking and dry shrinkage; the anti-seepage layer is compounded by nano graphdiyne and a calcium sulphoaluminate-calcium oxide expanding agent, so that super-strong anti-seepage and crack self-repairing are realized; the sealing layer is composed of butyl rubber and zinc citrate, joints are efficiently sealed, and calcium carbonate crystallization is inhibited. The construction technology comprises the steps of laying of the permeable geotextile, layered pouring, joint strengthening of the pre-compressed sugarcane fiber strips and triple curing. The concrete has the advantages of being high in impermeability, excellent in self-repairing performance, good in crack resistance, durable in seam sealing, environmentally friendly and the like, and is suitable for water conservancy projects such as channels.

The application belongs to the technical field of biological medical materials, and discloses a polydopamine modified modified nano-graphyne and a preparation method and application thereof. In the method, the polydopamine coating is combined with the nano-graphyne for the first time to construct a GDY@PDA composite system, and the core defects of the blocky graphyne, such as easy agglomeration, poor water solubility and insufficient biocompatibility, are solved. The graphyne-based material is applied to the near-infrared two-region photothermal regulation of neural cell calcium influx for the first time, the calcium ion channel is activated through the local thermal effect of the material, and precise, remote and reversible calcium influx regulation is realized; the limitation that the traditional biocompatibility modification is easy to fall off and difficult to functionalize is broken through, the polydopamine modification makes the material have both photothermal efficiency and biological safety, and the application of the graphyne in the treatment of neural diseases (such as neural cell injury repair) is expanded.

The invention provides an amidoxime group modified graphdiyne material and a preparation method thereof. The preparation method comprises the following steps: (1) preparing graphdiyne through in-situ growth on a template; (2) carrying out cyanation modification on the graphdiyne; and (3) carrying out amidoximation reaction on the graphdiyne subjected to cyanation modification. Before amidoximation reaction, the cyan-modified graphdiyne-template composite material can be selectively dispersed in an oxidizing agent, the template is removed through etching of the oxidizing agent, and then the amidoxime-modified graphdiyne material is prepared. According to the invention, terminal alkyne dispersed by graphdiyne is utilized, and amidoxime groups are grafted through chemical modification, so that the introduced groups are far away from one another and are distributed in a free state. The prepared amidoxime group modified graphdiyne material has excellent selectivity on uranium element, and can be used for high-selectivity seawater uranium extraction and efficient separation of uranium and vanadium elements.

The application discloses a kind of spin latches based on ultrafast magneto-optical dynamics, construction method and system, belong to spin dynamics technical field, the basic function of RS latch is realized by the angle of Co4&gamma-Graphyne system spin state control, successfully designed with RS latch as the foundation spin latch latch, the logic unit consumed is less, compared with the traditional latch, avoid the influence of glitch, and the entire completion time reaches ultra-high speed sub-picosecond, guarantee degree is more than 95%.This provides a train of thought for the design and application of new generation spin latch.

The invention relates to a graphdiyne-coated sulfur-doped modified carbon negative electrode material as well as a preparation method and application thereof. The preparation method of the carbon negative electrode material comprises the following steps: carrying out hydrothermal treatment on a glucose solution to obtain black powder, mixing the black powder with sulfur powder, and heating and carbonizing in an inert atmosphere to obtain a C-S material; dispersing the obtained C-S material in a solvent, and carrying out heating reaction to obtain a reaction solution; then adding an HEB graphdiyne monomer solution into the reaction solution to obtain a reaction mixture; and under a dark condition, carrying out heating reaction on the obtained reaction mixture in an inert atmosphere to obtain the carbon negative electrode material. The sulfur-doped and graphdiyne-coated synergistically modified carbon negative electrode material provided by the invention is stable in structure and excellent in electrochemical performance. The graphdiyne coating layer can inhibit volume expansion in the charging and discharging process, enhance the structural stability, provide additional lithium storage sites and realize long-life cycle under the fast charging condition.

The invention belongs to the technical field of biomedical materials, and discloses polydopamine modified nano graphdiyne as well as a preparation method and application thereof. According to the method, a polydopamine coating is combined with nano graphdiyne for the first time, a GDY and PDA composite system is constructed, and the core defects that blocky graphdiyne is prone to agglomeration, poor in water solubility and insufficient in biocompatibility are overcome. The graphdiynyl material is applied to near-infrared two-region photo-thermal regulation and control of nerve cell calcium internal flow for the first time, a calcium ion channel is activated through the local warming effect of the material, and accurate, remote and reversible calcium internal flow regulation and control are achieved; the limitation that traditional biocompatibility modification is easy to fall off and difficult to functionalize is broken through, the material has photo-thermal efficiency and biological safety through polydopamine modification, and the application of graphdiyne in nerve disease treatment (such as nerve cell damage repair) is expanded.

The application discloses a borohydride / graphyne composite hydrogen storage material, a preparation method thereof and application of the borohydride / graphyne composite hydrogen storage material in the field of hydrogen storage. The borohydride / graphyne composite hydrogen storage material comprises a graphyne carrier and borohydride loaded on the carrier. The preparation method comprises the following steps: adding the graphyne into a homogeneous solution of the borohydride and performing ultrasonic dispersion, then removing part of the solvent in a state of keeping the graphyne suspended to form a paste, and finally removing the solvent by vacuumizing to obtain the borohydride / graphyne composite hydrogen storage material. The graphyne is used as the carrier, so that the stability of the borohydride in the hydrogen absorption and release cycle can be ensured. The borohydride / graphyne composite hydrogen storage material has low hydrogen release initial and peak temperatures, good hydrogen absorption and release kinetic performance and high hydrogen absorption and release reversibility.

The invention develops an axial weak coordination synthesis method for regulating and controlling a cobalt phthalocyanine molecular metal d band center based on a graphdiyne topological structure. The method is characterized in that a series of graphdiyne two-dimensional interfaces with different topological structures are obtained by regulating and controlling the arrangement and proportion of sp-and sp-hybridized carbon atoms, and the adsorption configuration of cobalt phthalocyanine molecules along the graphdiyne topological structure two-dimensional interfaces is regulated by utilizing the d-pi action between sp-carbon and a cobalt metal center. The weak coordination regulation effect of sp-carbon on the d band center of cobalt phthalocyanine metal is realized. In the process of preparing hydroxylamine from nitrate through electro-catalysis, the adsorption energy of hydroxylamine at the Co-N4 site is reduced through the axial weak coordination effect of sp-carbon; sp-carbon can be used as a transfer station for catalyzing nitrate to nitrite to assist the nitrite to be reduced into hydroxylamine at the cobalt phthalocyanine Co-N4 site, so that a full-chain series catalytic mechanism is formed.

The present invention discloses a method for preparing one-dimensional graphyne chains. In this method, a silver single crystal substrate with a (110) crystal plane is selected as a substrate. Precursor molecules, PBDA, are deposited onto the surface of the silver single crystal substrate via molecular beam epitaxy to obtain a self-assembled sample. This self-assembled sample is then gradually annealed to induce molecular polymerization, thereby obtaining one-dimensional graphyne chains connected by carbon-carbon triple bonds. This method provides a method for preparing one-dimensional graphyne chains with high scientific research value and broad application potential.

The present application relates to the technical field of oxygen reduction catalyst, in particular to a kind of metal single-atom doped nanocarbon material catalyst and its preparation method and application.In the present application, nitrogen-containing ligand is first coordinated with metal salt to form M-N bonding complex, which can improve the proportion of effective M-N active sites, and then the graphdiyne is mixed with M-N complex, which can limit the complex in molecular pores, so that the metal atom is atomically dispersed, and finally a single-atom doped graphdiyne-based oxygen reduction catalyst material is obtained.

A hydrogen gas storage tank includes a body including a metallic bulk region and one or more protective layers adjacent to the bulk region. One or more of these protective layers comprise a number of graphyne molecules such that the one or more protective layers are configured to lower hydrogen adsorption into the bulk region when compared to a bulk region with protective layers free from graphyne.

The invention discloses a zinc sulfide and graphdiyne nano composite material for mercury vapor adsorption removal, a preparation method and application, zinc sulfide is attached to the surface of graphdiyne in a nanoparticle state, and the preparation method is as follows: zinc sulfide is attached to the surface of graphdiyne in the nanoparticle state through a hydrothermal method. The invention aims to provide a zinc sulfide and graphdiyne nanocomposite for adsorbing and removing mercury vapor as well as a preparation method and application of the zinc sulfide and graphdiyne nanocomposite, so that the mercury vapor is efficiently removed through the zinc sulfide and graphdiyne nanocomposite.

This invention discloses a method for preparing two-dimensional chiral graphyne via terminal alkyne coupling. The method uses a chiral graphyne framework as the building block and hexaethynylbenzene and chiral terminal alkyne monomers as co-building units. By optimizing the catalytic system (a combination of copper-based catalyst and organic base) and controlling key process parameters such as coupling reaction time, a one-pot in-situ construction of two-dimensional chiral graphyne is achieved. This invention significantly shortens the synthetic route, greatly simplifies the processing steps, and avoids damage to the intrinsic conjugated framework of graphyne during post-modification processes, providing a new approach for obtaining structurally complete and stable two-dimensional chiral graphyne materials.

This invention provides a method for preparing graphyne with all rhombic molecular channels, comprising: S1 ultrasonically cleaning a copper foil in a hydrochloric acid solution to obtain a pretreated copper foil substrate; S2 placing the pretreated copper foil substrate in a double-necked flask containing a palladium catalyst, adding a reaction solvent, and refluxing to obtain an activated copper foil substrate; S3 adding a polybrominated benzene and a magnetic particle sequentially to another double-necked flask, placing the activated copper foil substrate in the flask, and then adding a reaction solvent to obtain a reaction system; S4 dissolving the polyyneylbenzene in the reaction solvent to obtain a first mixed solution, adding the first mixed solution to the reaction system for synthesis to obtain graphyne with all rhombic molecular channels. By using trisubstituted and hexasubstituted monomers for cross-coupling reactions, a two-dimensional conjugated carbon framework with all molecular channels being rhombic is precisely constructed, synthesizing a graphyne-like carbon material with all molecular channels being rhombic.

The invention belongs to the technical field of diamond synthesis, and particularly relates to an artificial diamond and a preparation method thereof. The preparation method comprises the following steps: (1) carrying out ball-milling mixing on graphite powder, a seed crystal and a catalyst, and then carrying out compression molding to prepare a synthetic column; performing high-temperature and high-pressure synthesis on the synthetic column to obtain an artificial diamond mixture; (2) carrying out acid treatment on the artificial diamond mixture, filtering, washing, drying and screening to obtain the artificial diamond; wherein the seed crystal is diamond coated with modified graphdiyne; the catalyst is MoS2 modified high-entropy alloy powder, and the high-entropy alloy powder is prepared from the following components in atomic percent: 20 to 30 at% of Fe, 20 to 30 at% of Co, 10 to 25 at% of Ni, 15 to 25 at% of Ti and 10 to 15 at% of Sm. The artificial diamond disclosed by the invention is high in growth rate, high in growth quality and excellent in toughness.

The application discloses a red phosphorus-graphdiyne composite material and a preparation method and application thereof, and belongs to the technical field of battery materials. The preparation method comprises the following steps: placing carbon paper and red phosphorus in a vacuum sealed reactor and performing heat treatment; in the process of heat treatment, sublimation and desublimation of the red phosphorus occur, and red phosphorus nanoparticles after desublimation are covered on the surface of the carbon paper; electrochemical deposition is performed on the obtained carbon paper covered with red phosphorus, so that the surface of the carbon paper is covered with copper elements, which are used as catalysts for growth of graphdiyne; the obtained carbon paper is added into a hexaalkynylbenzene solution, and reaction is performed in a dark environment; and unreacted copper elements are washed away by using an acidic iron salt mixed solution, so that the red phosphorus-graphdiyne composite material is obtained. The composite material has wide application prospects in lithium ion batteries and other ion battery negative materials.

The application discloses application of amido functionalized graphdiyne quantum dots in preparation of a two-dimensional perovskite solar cell and belongs to the technical field of photovoltaic devices. The amido functionalized graphdiyne quantum dots contain amido groups and hydroxyl groups simultaneously; the particle size of the amido functionalized graphdiyne quantum dots is 1-4 nm; and the two-dimensional perovskite solar cell is prepared by doping the amido functionalized graphdiyne quantum dots into a two-dimensional perovskite light absorption layer. The application constructs a kind of nanomaterial with structural regulation and functional modification, realizes the synergistic optimization of the crystal growth orientation of the perovskite light absorption layer, the carrier transport behavior and the film stability, and thus significantly improves the overall performance of the photovoltaic device.

The invention discloses a manganese dioxide / graphdiyne composite material as well as a preparation method and application thereof, and belongs to the technical field of catalytic materials. The preparation method of the manganese dioxide / graphdiyne composite material comprises the following steps: mixing a manganese salt solution and graphdiyne to obtain a solution a, mixing a potassium permanganate solution and the solution a to obtain a suspension, and reacting the suspension at 130-180 DEG C to obtain the manganese dioxide / graphdiyne composite material. In addition, the invention also provides an application of the manganese dioxide / graphdiyne composite material prepared by the preparation method in catalytic ozonolysis. The composite material provided by the invention can effectively decompose ozone.

The application relates to a preparation method of a polyamide composite nanofiltration membrane containing a graphdiyne intermediate layer and application thereof, and belongs to the field of membrane separation and technology. The polyamide composite nanofiltration membrane contains a porous substrate, a graphdiyne intermediate layer and a polyamide layer. The graphdiyne is selected from graphyne, graphdiyne, hydrogen-substituted graphdiyne and other graphdiyne derivatives. The specific preparation method is as follows: a graphdiyne dispersion liquid is suction-filtered onto a porous substrate, is respectively immersed in an aqueous phase and an oil phase, interfacial polymerization is carried out to generate a polyamide membrane, finally, the membrane is dried in a constant-temperature and constant-humidity oven, and a polyamide composite nanofiltration membrane containing a graphdiyne intermediate layer is obtained. The preparation method is simple and efficient, the prepared composite membrane can effectively intercept divalent salts and organic matters in water, and has excellent water permeability, ion separation and antibiotic desalination effect.

A method for producing an electrically conductive conductor bundle (1) comprising at least one carbon conductor (3), comprising the following steps: a) producing or providing the conductor bundle (1) as an intermediate product comprising at least one carbon conductor (3), the carbon conductor in particular comprising graphite, pyrolytic graphite, graphene, graphyne and / or carbon nanotubes, b) introducing the conductor bundle (1) and one or more intercalation substances (2), in particular one or more metal halides or one or more organic alkali metals, into the gaseous or liquid phase of a reactor volume (5), wherein the intercalation substances are suitable for intercalation into the material of the at least one carbon conductor (3) of the conductor bundle (1), and c) subjecting the conductor bundle (1) to a thermal treatment, wherein the reactor volume (5) is brought to a process temperature in order to induce intercalation (4), wherein atoms or molecules of the intercalation substance (2) are intercalated into the material of the respective carbon conductor (3), in particular accumulated on the carbon structure of the carbon conductor (3), in particular in the regions between the layers of the multilayer carbon structure.

A method for the synthesis of multilayer γ-graphyne, an intrinsically semi-conducting sp2 / sp1 allotrope of carbon, through crystallization-assisted irreversible cross-coupling polymerization.

The application belongs to the technical field of electronic circuits, and particularly relates to a high-order topological insulator circuit design method based on graphdiyne structure. The method comprises the following steps: (1) establishing an LC circuit model of a two-dimensional rhombus-shaped graphdiyne structure; (2) obtaining the admittance matrix of the circuit according to the Kirchhoff equation, solving the matrix eigenvalues and eigenvectors by using MATLAB, and obtaining the admittance band structure; (3) changing the size of the capacitance proportion parameter, so that the topological phase transition of the circuit system can be realized; (4) in the topological non-trivial phase parameter region, the impedance distribution under different frequencies is calculated, and it can be observed that the system has zero energy angle state, i.e. second-order topological state; (5) the impedance distribution under a specific frequency is measured, and it is observed in the experiment that the topological angle state is localized in the obtuse angle or acute angle region of the rhombus-shaped circuit board, and the system has high-order topological properties.

The application provides a graphdiyne hollow multi-shell material and a preparation method and application thereof, and comprises the following steps: (1) preparing a metal oxide hollow multi-shell; (2) reducing the metal oxide hollow multi-shell to obtain a metal hollow multi-shell; (3) in-situ growth preparation of a metal / graphdiyne hollow multi-shell material in a reaction solution by taking the metal hollow multi-shell as a template; and (4) finally, the metal hollow multi-shell template is removed by etching to prepare the graphdiyne hollow multi-shell material. According to the preparation method, the metal oxide hollow multi-shell can be converted into the metal hollow multi-shell while the morphology is kept through reduction, and the graphdiyne can be formed on the inner and outer surfaces of each layer of the metal hollow multi-shell through the in-situ growth method, and the graphdiyne hollow multi-shell is obtained after etching the metal template, and the graphdiyne hollow multi-shell can be used as a photothermal material for heavy metal ions and radioactive metal ion purification in water.

The application discloses to belong to the technical field of lithium ion battery, specifically relates to a kind of fast charging graphite negative electrode material, its preparation method and lithium ion battery, and lithium ion battery negative electrode material is graphene / carbon nanotube composite and graphdiyne modified graphite, graphene / carbon nanotube composite and graphdiyne are coated on the surface of graphite particle, and the mass percentage of graphene / carbon nanotube composite in modified graphite is 0.1-1%;The mass percentage of graphdiyne in modified graphite is 0.05-0.5%.In graphene / carbon nanotube composite, the mass ratio of graphene and carbon nanotube is 1:1~5:1.The fast charging graphite negative electrode material can effectively improve the safety performance of the battery while improving the fast charging performance.